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What’s the difference between an HV1 and HV3 accordion shutter?

Both are approved for use in Florida’s High Velocity Hurricane Zone.
The HV3 shutter is strictly a residential shutter.  It uses the same lock, centermate, and locking pins as the HV1 but the shutter blades and tracks are slightly thinner. The HV1 can be used as a residential or a commercial shutter.  With the heavier blades, tracks and larger accordion screws it is our top seller.